find dy/dx in terms of y;
I am not sure which rule to use, do I use the product rule or chain rule?
I thought I should use the chain rule and this is what I get;
first differentiate cos which = -sin
than do y^2 to get 2y.
I know this wrong, but can someone please tell me what I am doing wrong?
the correct answer is
I think am not understanding how your using the chain rule on
I use this expression ;
there's no 'inside bit in the expression its just one, so how do you separate the variables?
for example in this expression I would first differenciate the expression in the bracket and than do the out side leaving the inside the same and than multiply both expressions.
So am just wondering how fits into the above formula.